In pulse conversion mode, ADC1 performs one conversion each time the START pin is taken high or the START1 command is sent. After the first conversion completes, further conversions are automatically stopped. To restart a conversion in progress, toggle the START pin or send a STOP1 and START1 command sequence. The DRDY output is driven high to indicate conversion start, and is driven low when the conversion data are ready. If a stop command is sent during an ongoing conversion, the command has no effect because the ADC completes the conversion.
The pulse conversion mode cannot be used in conjunction with chop mode. Instead, use the continuous-conversion mode when chop is enabled by briefly pulsing the START pin (or sequentially send the START1 and STOP1 commands) to achieve the same single-conversion result provided by the pulse conversion mode.